Penning Trap Measurement of the Magnetic Moment of the Antiproton

2005 ◽  
Author(s):  
José Verdú
Keyword(s):  
Magnetic Moment ◽  
Penning Trap

scholarly journals Theory of the Anomalous Magnetic Moment of the Electron

Atoms ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 28 ◽  
Author(s):  
Tatsumi Aoyama ◽  
Toichiro Kinoshita ◽  
Makiko Nio
Keyword(s):  
Fine Structure ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Penning Trap ◽  
Weak Interactions ◽  
Perturbation Expansion ◽  
Structure Constant ◽  
Fine Structure Constant ◽  
Best Value

The anomalous magnetic moment of the electron a e measured in a Penning trap occupies a unique position among high precision measurements of physical constants in the sense that it can be compared directly with the theoretical calculation based on the renormalized quantum electrodynamics (QED) to high orders of perturbation expansion in the fine structure constant α , with an effective parameter α / π . Both numerical and analytic evaluations of a e up to ( α / π ) 4 are firmly established. The coefficient of ( α / π ) 5 has been obtained recently by an extensive numerical integration. The contributions of hadronic and weak interactions have also been estimated. The sum of all these terms leads to a e ( theory ) = 1 159 652 181.606 ( 11 ) ( 12 ) ( 229 ) × 10 − 12 , where the first two uncertainties are from the tenth-order QED term and the hadronic term, respectively. The third and largest uncertainty comes from the current best value of the fine-structure constant derived from the cesium recoil measurement: α − 1 ( Cs ) = 137.035 999 046 ( 27 ) . The discrepancy between a e ( theory ) and a e ( ( experiment ) ) is 2.4 σ . Assuming that the standard model is valid so that a e (theory) = a e (experiment) holds, we obtain α − 1 ( a e ) = 137.035 999 1496 ( 13 ) ( 14 ) ( 330 ) , which is nearly as accurate as α − 1 ( Cs ) . The uncertainties are from the tenth-order QED term, hadronic term, and the best measurement of a e , in this order.

A Novel Penning‐Trap Design for the High‐Precision Measurement of the 3 He 2 + Nuclear Magnetic Moment

2019 ◽  
Vol 531 (5) ◽  
pp. 1800485 ◽  
Author(s):  
Antonia Schneider ◽  
Andreas Mooser ◽  
Alexander Rischka ◽  
Klaus Blaum ◽  
Stefan Ulmer ◽  
...  
Keyword(s):  
High Precision ◽  
Magnetic Moment ◽  
Precision Measurement ◽  
Penning Trap ◽  
Nuclear Magnetic Moment ◽  
High Precision Measurement ◽  
Trap Design ◽  
Nuclear Magnetic

Measurement of the gJ factor of a bound electron in hydrogen-like oxygen 16O7+

2002 ◽  
Vol 80 (11) ◽  
pp. 1233-1240 ◽  
Author(s):  
J L Verdú ◽  
T Beier ◽  
S Djekic ◽  
H Häffner ◽  
H -J Kluge ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Penning Trap ◽  
Bound State ◽  
Relative Precision ◽  
Nuclear Correction ◽  
Bound Electron

The magnetic moment of the electron bound in hydrogen-like oxygen O7+ has been determined using the "continuous Stern–Gerlach effect" in a double Penning trap. We obtained a relative precision of 2 x 10–9. This tests calculations of bound-state quantum electrodynamics and nuclear correction. PACS No.: 32.10Dk

The net magnetic moment of an assemblage of randomly oriented dipoles

Tellus ◽  
1973 ◽  
Vol 25 (3) ◽  
pp. 300-304 ◽  
Author(s):  
L. Kristjansson
Keyword(s):  
Magnetic Moment

Magnetic Moment of an Electron, its Spin and de Broglie Oscillations.

2019 ◽  
Author(s):  
Volodymyr Bezverkhniy ◽  
Vitaliy Bezverkhniy
Keyword(s):  
Magnetic Moment

Thermally Reversible Nanoparticle Aggregation Explains Magnetic Moment Increase with Temperature

2013 ◽  
Vol 9 (3) ◽  
pp. 381-386 ◽  
Author(s):  
Bashar Issa ◽  
Ihab M. Obaidat ◽  
Shahnaz M. Qadri ◽  
Tahir Abdulrehman ◽  
Yousef Haik
Keyword(s):  
Magnetic Moment ◽  
Nanoparticle Aggregation
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